Speed-regulator for elevators



(No Model.) Y

W. E. NICKERSON.

SPEED RBGULATORPOR BLBVATORS.

No. 398,972. ,Patented Mar. 5, 1889.

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UNITED STATES PATENT tlrrrcn,

4WILLIAM E. NICKERSON, OI" CAMBRIDGE, MASSACHUSETTS.

SPEED=RGULATOFI FOR ELVATORS.

SPECIFICATION forming part of Letters Patent No. 898,972, dated March 5, 1889.

Application filed November 30, 1888. Serial No. 292,234. (No model.)

T o all whom it 7a2/ary concern:

Be it known that I, VILLIAM E. KICKER- sON, of Cambridge, in the county of Middlesex. and State of Massachusetts, have invented a new and useful Improvement in Fluid Speed-Regulators for Elevators, ot which the following, taken in connection with the accompanying' drawingt, is a specification.

The object of my invention is to combine with a fluid speed regnlating-cvlinder and its operating` parts an independent device that sha-ll regulate the amount ot' restriction to which the restraining-fluid in .its iovv from one side of' the piston to the other is f-o he subjected. This object I att-ain by the mechanism shown in the accompanying drawings, in Which--- Figure l is a front elevation ol one Yforni of my device as applied to a fluid speed-regulan tor. Fig. 2 is a side elevation of the same, (cylinder not shown g) and Fig. 3 is an enlarged section in detail.

In Figs. lV and of the drawings, A repro sents adrinn, A a safety-rope, and C a counierbalancC-rope. Af. each end of the shaft A2 of the drum A, l have a` crank'disk, l, and a crank-pin, B'.

In the drawings I have shown two Iiuid spced--regulating' devices, one at each end of' the drum-shaft, although one such device might do the Work required.

Each of the fluid speed-regulating devices l that I have chosen for the purpose of illusiii-ating` my invention consists ot a cylinder, l

C, in .vhich a piston (not shown) works.

t is the piston-rod, which is connected to g l and fluid-cylinder C, substantially as dethe cross-head L', said cross-head L beingl guided by ways I lli, and is connected to the crank-pin li hy the link Ii, so that the drum A cannot revolve except the piston in the cylinder C traverses, and as the motion of the piston is governed hy the passage of' fluid from one side of it to the other (in this case wholly or partly through the pipe H3) it is evidenttha-t the speed of the drinn A is controlled liv the said passage ot' finid.

My invention'consists in adding` to a fiuid speed-regulating device an independent governor, the function of which shall he to regnlate the amount of restriction given to the fioW of fluid from one side of the piston to the other.

I will now describe the form of governor and its adjunets that l have selected for application in this case.

D3, Figs. l and i?, shows an ordinary balk governor, the sliding stem Di ot' which oper-Y ates the lever E2, E having a` fnlcrnni at E', and through it the links I-I H, which in turn raise or lower the levers Il H. Each. of the levers H' Il gives a rotary movement to the plug-valve H2, working in its socket-piece H1, connected to the pipe H3, (see Fig. 3,) and as some of the fluid in the cylinder C has to fiovv through the pipe H3 at each movement of the piston it is evident that the rapidity of flow of Huid through the pipe H3 must have a deft nite relation to the speed of the drum A, andas this velocit)vv ot flow depends upon the opening in thc plug-valve HA2 Il1 it must of' neces sity depend also on the position et' the lever H', which is controlled hy the governor D3. The governor D3 is driven by the beveled gea-r D on the drinn-shaft A2 through the gear D' and shaft D2, Figs. l and I claim- In afluid speed-regnlai ing device, the coinhination of a governor, D3, intermediate coni i l nections, and valve I-l2 H4, with the pipe H3,

scribed, and for the purpose set forth.

WILLIAM E. NICKERSON.

lVitncsses:

FRANK G. PARKER, MATTHEW M. BLUNT. 

